Transformerless dc-to-dc converters with large conversion ratios

Details Transformerless dc-to-dc converters with large conversion ratios Transformerless dc-to-dc converters with large conversion ratios

1984-11-02

1987-03-31

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 61, 363 62, H02M 3335

Patent

active

046547690

ABSTRACT:
A switching dc-to-dc converter with a variable conversion ratio of NT.sub.1 /T.sub.2 or T.sub.1 /NT.sub.2 utilizes N reactance elements, selected to be either all capacitors or all inductors, for energy transfer from a voltage source to a load. Switches are utilized for connecting the elements in parallel, or series, to the source, and for connecting the elements in series, or parallel, to the load, alternately. Operation of the switches that alternately connect the elements to the source, and switches that connect the elements to the load, determine the variable part of the conversion ratio NT.sub.1 /T.sub.2 or T.sub.1 /T.sub.2 N by control of the time T.sub.1 that the elements are connected in series, or parallel, with the source, and of the time T.sub.2 that the elements are connected in parallel, or series, with the load.

REFERENCES:
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4186436 (1980-01-01), Ishiwatari
patent: 4321661 (1982-03-01), Sano

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